4x^2+4x-51=0

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Solution for 4x^2+4x-51=0 equation:


Simplifying
4x2 + 4x + -51 = 0

Reorder the terms:
-51 + 4x + 4x2 = 0

Solving
-51 + 4x + 4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
-12.75 + x + x2 = 0

Move the constant term to the right:

Add '12.75' to each side of the equation.
-12.75 + x + 12.75 + x2 = 0 + 12.75

Reorder the terms:
-12.75 + 12.75 + x + x2 = 0 + 12.75

Combine like terms: -12.75 + 12.75 = 0.00
0.00 + x + x2 = 0 + 12.75
x + x2 = 0 + 12.75

Combine like terms: 0 + 12.75 = 12.75
x + x2 = 12.75

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 12.75 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 12.75 + 0.25

Combine like terms: 12.75 + 0.25 = 13
1.25 + x2 = 13

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(x + 0.5) equal to 3.605551275 and -3.605551275.

Subproblem 1

x + 0.5 = 3.605551275 Simplifying x + 0.5 = 3.605551275 Reorder the terms: 0.5 + x = 3.605551275 Solving 0.5 + x = 3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 3.605551275 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.605551275 + -0.5 x = 3.605551275 + -0.5 Combine like terms: 3.605551275 + -0.5 = 3.105551275 x = 3.105551275 Simplifying x = 3.105551275

Subproblem 2

x + 0.5 = -3.605551275 Simplifying x + 0.5 = -3.605551275 Reorder the terms: 0.5 + x = -3.605551275 Solving 0.5 + x = -3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -3.605551275 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.605551275 + -0.5 x = -3.605551275 + -0.5 Combine like terms: -3.605551275 + -0.5 = -4.105551275 x = -4.105551275 Simplifying x = -4.105551275

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.105551275, -4.105551275}

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